package dao.impl;

import dao.Paper;

public class TextPaper implements Paper {
    private int charPerLine = 16;       //每行字符数
    private int linePerPage = 5;        //每页行数
    private String content = "";        //纸张中内容
    private int posX = 0;               //当前横向位置，从0到charPerLine-1
    private int posY = 0;               //当前纵向位置，linePerPage-1
    private int posP = 1;               //当前页数

    @Override
    public String getContent() {
        String ret = this.content;
        //补齐本页空行，并显示页码
        if (!(posX == 0 && posY ==0)){
            int count = linePerPage - posY;
            for (int i = 0;i < count;++i){
                ret += Paper.newLine;
            }
            ret += "== 第"+posP+"页 ==";
        }
        return ret;
    }

    @Override
    public void putInChar(char c) {
        content += c;
        ++posX;
        //判断是否换行
        if(posX == charPerLine){
            content += Paper.newLine;
            posX = 0;
            ++posY;
        }
        //判断是否翻页
        if (posY == linePerPage){
            content += "== 第"+posP+"页 ==";
            content += Paper.newLine + Paper.newLine;
            posY = 0;
            ++posP;
        }
    }

    //使用set方法注入每行字符数
    public void setCharPerLine(int charPerLine) {
        this.charPerLine = charPerLine;
    }

    //使用set方法注入每页行数
    public void setLinePerPage(int linePerPage) {
        this.linePerPage = linePerPage;
    }
}
